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nadiatraskovsk
@nadiatraskovsk
July 2022
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решить систему уравнений х^2-y^2=19 x-y=1
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GayaneGhazaryan
X=y+1
(y+1)^2-y^2=19
y^2+2y+1-y^2=19
2y+1=19
2y=18
y=9
x=9+1=10
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Answers & Comments
(y+1)^2-y^2=19
y^2+2y+1-y^2=19
2y+1=19
2y=18
y=9
x=9+1=10